Elevator control system



July 30, 1935. E. L, GALE 2,009,395

ELEVATOR CONTROL SYSTEM Filed Nov. 50, 1927 4 Sheets-Sheet 1 0 9 Down 7F INVENTOR fin st L. Gila AT TORNE nazufiy 36 119350 E. L. GALE fi fiELEVATOR CONTROL SYSTEM Filed Nov. 30, 192'? 4 Sheets-Sheet 2 Fi -J5.

INVENT OR Frnes i L. 6a. 16

AITORNE 2-2. GALE mwwa ELEVATOR CONTROL SYSTEM Filed Nov. 50, 192741Sheets-Sheet, 3

Z 123 INVENTOR 55 finest L.6ale

' RNE L/q/ IATTO July 30, 1935, E: L. GALE 2,@9 @5 ELEVATOR CONTROLSYSTEM Filed Nov. 50, 1927 4 Sheets-Sheet 4 INVENTOR ir/iesz L. 64k

AT TOR Y5 Patented July 30, 1935 7 UNITED STATES 1 PATENT OFFICE Y c I2,009,395

I ELEV A TOR ooN'rRoL SYSTEM Ernest L, Gale, Yonkers, N. Y; assignonibymes ne assignments, to The Gurney Elevator 00., Hon'esdale, -I a. acorporation'of Pennsylvania Application November 30, 19 2 7; Serialllo.236,740

' 50 Claims. I (o1. 187- 29) This invention relates to a push buttoncontrol system for elevators..- v a The objects of-theinventionreside invarious provisions summarized as follows: r j. First,--a push buttoncontrol system having combined dispatch and, intercepting functions andarranged ,for multi-speed elevators, the control means, i. e.,;pushbuttons and their associated floor-relay switches, being operable:collectively,

or in other words, at any time regardless of-the.

position of the car and the direction of carmovement and efiective'tointercept the car by efiecting its slow-down and stop, at the landingssuccessively in their natural order regardless of the I orderin whichthe push buttons are actuated,

the car for any onedirection of movement completing its tripto.a-farth'est landing for which apush button is actuated before reversalof car movement is normally efiective:

Second, a push button control system for multispeed elevatorscomprisingfor each of a plurality of landingsflup and. down push buttonslocated at the landings and on the car, having combined dispatch. andintercepting functions: Third, means for rendering the system efiectivefor dispatch of the car in the event of the car gate being left in openpositionby the last passenger to leave the car:

. Fourth, means automatically to return the car to a'selected landing orhome station:

- ,Fifth,a time-limit switch to control duration of each car stop,effective at the expiration of 'a predetermined period of time, providedthe car gate and the hoistway doors areclosed but regardless as towhether they are opened during the stopping period to continuemovementof the car in the same direction as when intercepted, or in-areverse direction as in the eventif the car has completed its trip inresponse to a farthest actuated push button:

Sixth, a push button control system arranged so-that any. actuated uppush button, or any farthest-up actuated down push button if for alanding above that for which a farthest-up .up button is actuated, ifactuated while the car is moving downwardly from its landing, will afterthe car completes its downward trip in response to any actuated buttonfarthest-down, condition the system for reverse car movement so that theact of closing the car gate and the hoistway'door at such farthest-downlanding, or the operation of the time-limit switch, will initiatemovement ofthe car upwardly. During movement of the car upwardly, onlyup push buttons at the intermediate landings are effective to interceptthe car and it is automatically slowed down and stopped at the landingfarthest-up for which a push button is actuated regardless as to whethersuch push button is an up or a down push-buttonz1 a Seventh, a pushbuttoncontrol system arranged so-that any actuated :down. push button,or any farthest-down.actuatedfupi push button if for a landing belowthat for which a farthest-down :down push button is actuated, ifactuated during movement of the carjupwardly away from its landing,will, after the car completes its upward trip in response to anyactuated push button farthest-up, condition the system for reverse carmovement so that the act of closing the car gate, andthe hoistway doorat such farthest-up landing, or the operationof the time-limit switch,will initiate movement of the car downwardly. During such downwardmovement of the car, only .down push buttons :at the intermediatelandings areiefiective to intercept it and it is automatically-sloweddown and stopped at the landing farthest-down for which a push button isactuated regardless as to whether such push button is an*up or a downpush button:

Eighth, a dual control system whereby the push-button system alonefunctions as herein before suggested, and for car'switch control, thecar switch is operable independently of the push buttons to establisheddirection for car movement and effect car start, slow-down, stop andreversal at will at any point intermediate the limits of car travel butat the same time the car and hall push buttons remain operable only tointercept the car. The car switch can remain in on or running positionuntil reversal of car movement is desired and at the same time the caris intercepted, or in other words, automatically slowed down and stoppedin response to actuated car and hall push buttons. Start of the car fromeach landing at which it is intercepted is effected by closing thelanding door and the car gate or by the operation of the time-limitswitch.

Briefly stated, a system of control as herein provided having up anddown push buttons for each intermediate landing, located at the landingsand on the car, is so arranged that according to one mode of operationthereof, a hall passenger needs only to momentarily actuate a hall pushbutton once which corresponds to direction in which it is desired totravel, and, assuming the car is not being used, such button, regardlessas to whether it is an up or a down push button, will initiate movementof the car toward its landing from a position above or below the latter.

' push button is inefifective to stop movement of.

Either theup or thedownpush buttonwill stop movement of the car which itinitiates, on first approachof the car toward its landing from eitherdirection conditional on the assumption that none of the push buttonsfor a landing or landings beyond and toward which the car is moving, isactuated subsequently to said initiating push button being actuated, andprior to car arrival at the landingcqiresp onding to said initiatingpush button. However, if car movement and the push button whichinitiates it, correspond as to diI'CC? tion, such push button will stopthe car at its landing on first approach thereto unconditionally. If carmovement and the push button which in itiates it do not correspond as todirection, such the car at its landing on first approach thereto ifduring said movement a push buttonatalanding or landings beyond andtoward which the car is moving is actuated, however, said initiatingpush button; by the single actuation thereof, conditions the' system sotha't when'the car completes its trip in-desponseto thefarthest actuatedpush button for the landing beyond,'direction is established for reversemovement of the car and the act of closing'the car gate and the hoistwaydoor, .or thepperatiOn of the time-limit switch initiatesmovement ofthe:carin reverse direction to return: itzto the'la'nding correspondingto the i initiating push bu'ttong and' the latter is effectiveautomaticallytdbausejslow-down and stop of the car during itsreturncmovement; 1 i

' Intheiaccompanying drawings,-:Figs; 1A and 1B illustrate in a more orless: diagrammatic manner, a push button controlsystem' of theintercepting type arranged'for a .multi-spe'ed elevator having for-eachof a' plurality-f landings, up and down push buttons at-the landingsandon the car; 1-:

Fig. 2 illustrates diagrammatically and in part, a push button controlsystemv of the intercepting type farranged for abmulti-speed elevatorand having a single push'sbutton at each of 1 the landings'and'correspon'din'g' push buttonson the car;

Fig. 3 is an endelevationfof a remote controller of a standardandwelliknown type slightly modified to adapt 'itfor'use. with thepresent arrangementof circuitspandw Fig. 4 illustrates diagrammatically,a modified form of control apparatustogether with certain circuits whichform a part of an'intercepting push button control system for amulti-speed elevator system of thetwo button type.

Referring now more particularly-to Figs. 1A

- andi-lB, the invention comprises an elevator car C .adapted. foroperation by .a hoisting motor -M.Tth1.011gh the intermediary of anywell known type' of gearing or roping (not shown); So far as the presentinvention is concerned/me hoisting-'motor may .be of any well known typeadapted formulti-speed regulation such, 'for'example, as may be obtainedby operating iii-by a Ward-Leonard system or what. is:commonly knowninthe art asa variablevoltage system,-'or'a multi-voyage system, or arheo-stat method of control which involves varying the strength of ashunt field winding A of the hoisting -motor,':the latter methodbeingillustrated herein'. Any method for obtaining speed regulationinvolvesathe use of a fast' and slow speed switchdesignated J. Otherelements which comprise thepre'sent. system are as fo1lows:-anelectromagnetically operable speed change switch B; 'anaccelerating-switch E tocontrol a sectio'nal starting resistanceFIor themotor M, a

car switch G; a change-over switch H by means of which the dispatchfunction or start of the car in one direction or the other as controlledby the push button controlled circuits is transferred to the car switch;electro-magnetically operable reversing switches R, R, to control thehoisting motor to move the car upwardly and downwardly respectively; upand down direction switches D and D respectively, the former havingcontactors l to control an energizing circuit for a winding 2 of the upreversing switch, and the latter having contactors 3 to control anenergizing circuit for a winding 4 of the down reversing switch. Anintercepting slow-down circuit 5 for an operating winding 6 for thespeed-change switch B is rendered eiiective for movement of the carupwardly by contactors l of the up direction switch D; an interceptingslow-down circuit 3 for said winding 6 is rendered effective formovement of the car downwardly by contactors 9 of the down directionswitch D. Car gate contactors, hoistway door contactors, an emergencystop switch, a cam releasing-magnet to control door locks (not shown)are designated I0, ll, l2 and 13 respectively. A car gate 14 is providedwith a gate closer comprising a lever 15 actuable' by a spring 1 6. Alatch mechanism consisting of a latch I! on-the car gate cooperatingwith a toothedrack i8 is arranged to hold the car gate open, the rack l8being actuated by an electro responsive device :9, to release the latchto render the spring 16 and lever I5 efiective to close the gate.

The system comprises further, up and down hall push buttons 20 and 2!respectively for each landing intermediate the end'landings and onebutton for each end landing. The car is provided with up and-down pushbuttons corresponding in number to the hall push buttons and designated23A and 21A.

Up and down floor-relay switches 22 and 23 respectively for each of theintermediate landlugs and one for each end landing are of a. well knownor standard type, each having a winding 24 energizable by momentaryactuation of its associated push button. These switches are maintainedin actuated position electrically, or in other words, are madeself-holding by providing for each winding a self-holding circuit 25which feeds said windings in parallel by way of their associatedself-holding contactors 26. The'initial energizing circuit as controlledby a push button and also the self-holding circuit for the upfloor-relay windings, includes contactors 2'! of relays 28, one of whichis associated with each up floor-relay switch.

Similar circuits for the down floor-relay windings include contactors 29of relays 30, one of which is associated with each down floorrelayswitch. The contactors 21 and 29 are normally closed and since the onlynormal opening or break in the energizing circuit for any floor-relayswitch winding is at its associated push button, this means that thepush buttons are actuable at any time, singly or collectively,regardless of the position of the car and the direction of movement ofthe car, to energize their associated floor-relay windings. Thecontactors 21 and 29 through their control of the self-holding circuits,function to maintain their associated floor-relay switches when actuatedin closed position until the car responds thereto by stopping'at theirlandings. Hence, this arrangement in eiiect requires any button to beactuated but once in order to effect response of the car there? to,regardless of the position of the car and the direction of movement ofthe car, when the-button is actuated. These relays 28 and 30 are ineifect what may be termed de-energizing relays and their windings'3l and32 respectively form two sets, each rendered efiective independently inaccordance with direction of car movement. Therefore, formovement 'ofthe car upwardly, windings 3! corresponding to landings stopped at aremomentarily'energized to open their contactors 21 to deenergize only upfloor-relay windings corresponding to' landings stopped at. Likewise,for movement of the car downwardly windings 32 corresponding to landingstopped at are momentarily energized to open their contactors 29 todeenergize only down floor-relay windings corresponding to landingsstopped at. The circuit-controlling apparatus for the windings 3| and 32comprises as a whole two sets of circuit-controllers, one effective formovement of the car upwardly and the other effective for movement of thecar downwardly. This circuitcontrolling mechanism is oithe'normallyopencircuited type consisting of ieed-contactors 33 and 3G actuable inaccordance with car position,

momentarily -to engage fiXed contactors '35 and 36 respectively for eachof the intermediate landings. When the car is at any one of thelandings, contactors and St electrically engage contactors 35 and 36 ofthe corresponding landing, said contactors being disengaged by movementof the car therefrom. A' feed wire connects the feed-contactors 33inparallel and includes the back contaetors 56 ofthe down direction switchD, and a feed wire 1 i I connects the feed contactors 3G in parallel andincludes the back contactors 58 of the up direction switch D. Thedirection switches are closable only one at a time and hence bycontrolling the feed wires 55 and Ill through the agency of their backcontactors, only one set of relays 28 or 29 is rendered eifective at atime which in effect means that for movement of the car upwardly only upfloor-relay windings "will be de-energized corresponding to landingsstopped at excepting when a farthest-up point of dispatch is reached, inwhich case either one or both will be de-energized, and for movement ofthe car downwardly only down floor-relay windings will be de-energizedcorresponding to landings stopped at excepting when a farthest-downpoint of dispatch is reached, in which case either one or both will bede-energized. With this arrangement, the effect will be such that eachpush button upon completing its function to cause stop of the car at itslanding, will as the car moves away from its landing, be renderedoperable again to energize its associated floor relay winding.

Car controlled floor-selector mechanism to control interceptingautomatic slow-down circuits and also directional circuits, isillustrated herein as being of a type located in the hoistway to beactuated by a cam on the car. However, the floor-selector mechanism maybe of the well known type slightly modified, as illustrated in Fig. 3located remotely from the car and actuated thereby directly by any ofthe well known types of drive such'as a cable and drum, reel and tape orthe sprocket and chain type (not shown). The floor-selector mechanismfor each of the intermediate landings consists of a pivoted switch arm3! carrying a segmental contactor 38 to cooperate with fixed contactors39 and 40 to control a feed for the up direction switch winding, and tocooperate with contactors 39 and 4| to control a ieed for the downdirection switch winding. A pair-of additional segmental contactors 42and 43 are also carried by the switch arm, the former to cooperate withfixed contactors 44, 45 and to controlthe up intercepting circuit which'effects automatic 'slowdown of the car when it is moving-upwardly andthe latter to cooperate with fixed contactors ll, 48 and 49 to controlthe down intercepting circuit which eiieots automatic slow-down of thecar when it is moving-downwardly.

The circuit controlling mechanism comprisingthe contactors 33 andcontrollable in accordance with car position together with theassociated fixed conta'ctors 35 and 36may beirr the form of a unitarystructure or itself located remotely'from the car in which case therewould be only one movable oontactor 33' for u'p di rection and onemovable contactor- 34'for down direction, said two contactors having"either an oscillating movement as effective byinouhting them on athreaded shaft or worm driven from the car, or being mounted on arotatable member, such, for exa'rnpl aas a car-driven shaft I of aremote controller illustratedin'liig. 3, said shaft carrying usualrocker arm's 461 which actuate the switch'mechanismof the remotecontroller in a well known mannen As illustrated in Fig. 1B, thecontactors 33 and 34 are carried by the pivoted switch-arm "3lfor-.eachinterma' diate landing and only'onecorita'ctor'is provided forthe end landings,"normally out of"engagement with theirfixed'conta'ctors 35 and36 so that movement of the switch 'arm 37- fromone position to another position'caus'es the 'contactors 33 and 35 tomomentarily engage their associated fixed contactors when-the car is ata landing and to disengage same when the-car moves away from thelanding.

The floor-relay switches for each intermediate landing comprise fup anddown contactors 5B "and 5| respectively which' together withfloor-selector switch oontactors 38, 39 and all control dispatchoperation or',-'in other words, initiate start of the car inr'e'sponseto actuated hall or car push buttons; throughcontrol of the up and downdirection-switches which are closable one at a time 'to close their topcontactcrs. Both the up and "down car-start contactors 59 and SI for anyone-landing are connected in parallel 'by'a wire 52 connecting with thecommon feed contactor 39 on the floorselector switch. t

The fioorselector switches "are actuated in a well knownmanner so thatwhen the car moves downwardly it sets the segments 38 to closecircuitcontactors '39 and 40. Acommon return wire 53 provid'esa feed ior:the"up direction switch winding and connects theupfioor-seleotorcontacts 40 in parallel. As the car moves upwardly it sets the segments38 to close-circuit contactors 39 and 4|; The contactors ll-"of all thefloor-selectors are connected in parallel by a common return wire-54 forthe down direction switch winding. Since the push'button controlledcar-start or dispatch .contactors- 5D and 5| for each intermediatelanding are connected in parallel by thefleommon wire 52 connecting'with the comm'on feed contactor 39 of the floor-selector switch,-eitherthe up or the down push button for each landing above car position isrendered efi'ective to control theup reversing switch, and either the upor down push button for each landingibelow. car position is renderedeffective to control the"down- ":re-

' being an up with their versing switch. This arrangement in efiectprovides means whereby a hall passengerneeds'only to press the hall pushbutton corresponding to the direction in which it is desired .to travel,and if the car is not in use, such push button regardless of whether itis an .up or a down push button, will originate movement of the cartoward its landing from a position either above or below it asdetermined by the setting of its associated segment 38 and effectslow-down and stop of the car at its landing from either direction onfirst approach thereto conditionally, but onlyv so if said initiatingbutton does not correspond to care movement which it initiates, or

- on second approach unconditionally..

A feed circuit 83 for the reversing switch windings constitutes anindependent or com-, plete' circuit by itself and is controlled by theaforesaid push button controlled car-start circuits through theircontrol of the direction switches to initiate car movement in onedirection or the other.

Two stop switches S and Sv are provided on the car, the switch S tocontrolall stops for movement of the car upwardly and the switch S tocontrol all stops to:v movement of the car downwardly. The switches areactuable to open-circuit their associated stop contactors by co-actionwith-cams T, T fixed in the hoistway there and down cam adjacent eachintermediate landing and one cam at each end landing. The up and downcams form two independent sets positioned in independent vertical planesand by coaction associated stop switches open their contactors onlymomentarily as the car approaches a landing. Each stop switch ismechanically maintained in inoperative position with its contactorsclosed, by means of a spring W, so that the switch rollers will notstrike 'cams at floors which are not stopped at. However, when slow-downis efiected one orthe other of the stop switches is movable byenergization of'an electro-responsive device H5 to operative position sothat its roller is in position to cooperate with its stop cam. Duringsuch movement of the switch to said operative position and until it isactuated by the cam, its contactors are maintained closed by arelatively light spring a: to maintain the energizing circuit for areversing switch winding closed uninterruptedly. W'hen stop isefifected, said stop switch is mechanically returned to normal orinoperative position by a spring W, so that when the car is at thelanding, the roller is retracted and the contactors are closed.

Hence, according to the mode of operation of the stop switches asconstructed and arranged herein, they are maintained in retractiveposition mechanically and at the same time their contactors are closed,and they are actuable by electroresponsive means to an operativeposition or, in other words, a cooperative position with respect totheir cams, independently in accordance with direction of car movement.

To intercept the car by effecting its automatic slow-down, two sets ofcircuits are provided, one set to intercept the car through the agencyof the speed-change switch B in response to actuated up push buttons,and the other set arranged to intercept the car through the agency ofswitch B in response to actuated down push buttons. The set ofintercepting circuits to effect automatic slow-down for movement of thecar upwardly, consists of the wire 5 connecting with a plus main bywires 59 and 60 and includes all the back contactors 6| of the upfloor-relay switches in series and connects with one of theterminalsofthe speed-change winding 6 after passing'through the updirection switch contactors 1. This series circuit, as will be evident,is susceptible of being open-circuited at any time at any of the backcontactors 6] by actuation of their associated floor-relays as efiectedby actuation of theirassociated up push buttons. However, anotherindependent circuit is completed for the winding 6 by way of wire 5' andincludes all the floor-selector switch contactors 42, 44 and 45111series for one position of the selector switch,'or,contactors'42, 45 and46 in series for the other; position of the selector switch. Thecontactors .44 and 46 of each switch are connected in parallel, so thatfor either of the two positions in which a selector switch is set bymovement of the car, it closes the series-circuit at that point but thiscircuitis opened only momentarily by movement of the contactor 42 fromone position to; the other. This series circuit or wire 5' forms a shuntaround all of the back contactors 6i, it branching-Irom-the wire 60 at ajunction 62, and after; shunting around all of saidcontactors Si by wayof the floor-selectors, it again forms a junction attfiz with the wire5. The series wire 5 provides an energizing circuit for the winding 8independently of the series wire 5, and is opencircuited at'only onepoint at a time or, in other words, only at a floor-selector switch whenactuatedby the car movement. The selector switches are constructed andarranged to break the circuit or wire 5' only momentarily and to quickly:reclose it so that in effect each break in the wire 5 is-oi relativelyshort duration as for example is obtained by a snap switch action. Thisoperation of the floor-selectors acts quickly to .re-close the wire 5' tcomplete the energizing circuit for the winding 6, efiectively preventsslow-down of .thecar when the latter is moving upwardly from beinginitiated by actuation of any push button after the car has passed theslowdown point corresponding to such a button. Witt the car at anylanding, the series circuit 5' i: completedby. way of the floor-selectorcontactor: independently of the shunt circuits. However, ll will beunderstood that any up push button actuated at such time is effective toenergize it: fioor-relaywinding and the latter will be maintainedenergized to maintain its floor-relay switcl in actuated positionuntil'the car responds there to by stopping at its landing, so that ineffect 1 is required to actuate any button only once il order to effectresponse thereto. Such momen tary opening and re-closing of the circuit5 b; means of a standard hoistway type of floor-selec torswitchmechanism is obtained by so position ing the contactor' 46 that bymovement of th car upwardly, the segmental contactor 42 will b caused toengage it immediately after disengagin the contactor 44 so that theenergizing circuit E is then re-closed at the contactors 45, 42 and 4iAs will be evident, the circuit 5' will be closed a a floor-selectorswitch when in either set posi tion as effected by movement of the carupward] and downwardly. The set of circuits 5'and 5 it will beunderstood, control the slow-down the car only when it is movingupwardly and a1 rendered operable by closing the wire 5 at tr.contactors 1 of the up direction switch D.

The back contactors 6| of each of the up floo1 relay switches control ashunt circuit around sai contactors including their respective selectswitch contactors 4-2, 44, 45 by way of parallel wires 63 whichcross-connect the two series wires 5 and 5.

Hence, when the car is moving upwardly it will not be slowed down atlandings for which up push buttons are not actuated because insuchcase-their associated contactors 6i shunt current from wire 5 aroundtheir respective floorselec-tors as each is actuated momentarily to opensaid Wire 5. In this manner, the winding 6 is maintained energized andcar movement -at fast speed rate will not be interrupted at suchlandings. 1 I

However, when. the car is moving upwardly. it will be automaticallyslowed, down when approaching landings for which up push buttons havebeen actuated because in such case contactors 61 which correspond-to theactuated "up pushvbuttons are opened, thereby opening the shunt aroundtheir associated floor-selectors.

.Therefore, the winding 6 will be de-energized .to eflect automaticslowedown as eachrfioor-selectorwhose shunt is open, is actuated by thecar. momentarily to open-circuit the series wire 5'.

Two wires 8, 8 controllable respectively by back contactors 6! ofthe"down floor-relays and floor-selector switch contactors,43," 4-1, 48and 49, together with shunt.wires:63'- form a set of circuits renderedetfectiveroy contacts 9 of the -down direction switch D, to. interceptthe, car by efiecting its automatioslow-down in response to actuated.down; push buttons, through control of the speed-change switch winding6. For dowmvardmovement of'the car, this set of circuits isv controlledat the fdown. floor-relay switch contactors 6i and the-floorselectorcontactors in the same manner as has been described forthe .set which'functionszto intercept the car when it is moving upwardly. This beingso, a detailed description of the down set of intercepting slow-downcircuits and the arrangement of the contactor mechanism to control sameis unnecessary, it being necessary only to point out that the two. setsof intercepting circuits are rendered effective independently inaccordance with up and down direction of car movement as determined bywhatever direction switch is in closed position.

A floor-selector of the well known remote type modified somewhat in amanner as illustrated in Fig. 3, provides for momentarily opening andagain re-closing both sets of intercepting circuits and also embodiescontact mechanism arranged to control the direction switch windingcircuits, the contact mechanism and so forth as illustrated constitutingthe arrangement for any one intermediate landing. Contac-tors I40control the up intercepting circuit 5' and contactors l4! control thedown intercepting circuit 8. Each set of contactors comprises a fixedcontactfinger to coact with a contactor carried by a usual rocker arm(42. Secured to the lateral face of the contact finger is an insulator143 having beveled ends and operating by a camming action to cause thefinger and stem to be electrically disengaged when the rocker arm isrocked in the usual manner by movement of the car. Hence, when movementof the car is upwardly, the intercepting circuit 5' as controlled byeach set of contactors I40, is open-circuited only momentarily when thecontactor on the rocker arm engages the insulator on the contactorfinger, and is re-closed by the contactor on the rocker arm engaging thecontact finger at a point below the insulator. The contactors l4| are ofthe same constructiomand for movement of the car downwardly have amode-oi operation the same as just described forsthecontac-tors I40. 1Two sets of contactors I44 and I45 are adapted. to control the circuitsfor the up and .downdirection switch windingsgeach set comprising acontact finger fixed in posi-ticnifor coaction with its associatedcontactor carried by the rocker arm. It will: be;seen ;from. thedescription and drawings that for any intermediate landing, the contactmechanism-and so forth therefor as arranged on a remotecontrollerconsists of the two rocker. arms- 42,142, each carrying twomovable contactors to coact with associated; contact fingers; and thatthe contact mechanism whichcontro-ls the intercepting wires 5 and 8 for.up.f-.and down- .movement of the car is constnucted-and arranged tobeopen-circuited only momentarily. 1 '-.Co ming now to a detaileddescription of the operation of the parts, a passenger needs onlytozactuate an .-up or a fidown hall push button accordingto-theflirection in which it is desired to travel -Mon1entaryactuati0 nof either of said buttons at any landingw-ill when the caris notalreadyin use, bring the car to that landing from its positiontwhetherfl; above or below same and effect its slow-down; and stopat'that landing. Assumenow,- for3-example, that thecar is not in useandis at-rest at the first landing with all the hoist-way doors and-cargate closed. For such condition, the various elements will assumepositions-illustrated. =A passenger at the third landing desires-to godown and accordinglyactuates the down button thereat. By momentarilyactuating said button -an.energizing circuit is completed for thewinding2 4 of the third landing ,down relay switch 22, causingthe-operation ofthe latter to-open itsback contactors El and close its two sets of topcontactors 5l and 25. This operation of the floor-relay switch'will inefiect:cause energization of the iup direction switch winding 64A, bycompleting its circuit at the contactors 5!; the contactors 26 completea selfholding energizing circuit for-the floor-relay switch winding 24;;and'opening of the back contactors I61 opens the shuntaround the thirdlanding floor-selector contactors which control the series energizingcircuit 8 for the winding 6 of: the speed-change switch. The updirection switch will now operate to close its top contactors I, I andNH, andopen its-back contactors 58 and H2. The energizing circuit 5' forthe winding 6 is now eompleted at the contactors 1 and thespeed-change'switch B will operate to close its contactors-Hand ,65 andto open its back contactors 436,-; An energizing. circuit for the .upreversingswitch winding ZjiS now completed by the closingofsthedirection.switchgcontactors l and the speed-changejswitc'h,contactors 64, to cause the .up--v reversing switch R toclose and at thesame timacause the brake'to release. The motor'M w-ilhnow operate tomove the car upwardly. The brake andmotor circuits are old and wellknown and, therefore,'-are'.not traced in detail herein. The:accelerating switch E operatesin awellgknown jmannento control thestarting-resistance, and when its last arm closes, it closesthecontactorsm. An energizing circuit for winding 86; of the-fastgandslowspeed switch .1 branches from the reversing switch winding circuitata1junction;83-and includesv the contactors 65 and-61', in series sothat withboth sets o f said contactorsclosed, said circuit is completedto effect operationtof; the switch J to open-circuit contactors 89and-thus open the-short-circuit around a resistor III in the-circuit ofthe shunt field winding A of the hoisting motor and cause operation ofthe hoisting motor to move the car at fast speed rate.

The push button circuit may be traced as follows: wire 59 connectingwith the plus main, through "doWn 'buttOn 2| at the third landing, wire-'II, relay switch winding 24 to wire I2, contactors29 of thede-energizing relay 30, wires 13, I4 and thence to the-minus main bywire'15.

The self-holding circuit for the third landing down floor-relay switchmay be traced as follows: the positive self-holding feed wire 25, wire'IG forming a junction at I8 with wire. 25-, selfholding contactors 26,wire I1 forming ajunction with wire II at 11', thence through relaywinding 24 to the minus line by way of the circuits as traced above.

The energizing circuit for the winding 64A of the up direction switchmay be traced as 'follows: from wire 59, wire 18, contactors5l, wire 52which connects up and-down" contactors 58 and 5| in parallel, throughthe third landing floor-selector switch by way of the contactor 39,segment 38 and contactor 48, wire I9 which forms a junction at 19' withthe common feed wire 53 which includes the change-over switch H andconnects by wire I36 with one of the terminals of the winding 64A of theup direction switch 'D, through said winding to back-contactors 8| ofthe down direction switch D, and thence by way of wire82 to the minusmain, said wire including back-contactors I95 of the down reversingswitch.

The energizing circuit for the winding 2 of the up reversing switch maybe traced as follows: wire 59, wire 83 including the car gate contactorsI0, contactors 84 controlled by the car gate rack I8, and emergency stopswitch I2, through'speed change switch contactors 64, to wire 85,direction switch contactors I', wire 86, through the winding 2 of the uprevers ng switch, wire 81, back-contactors 88 of the down reversingswitch, and thence to the minus main by wire 89 which includes thenormally closed contactors 90 and. 9| of the up and down stop switchesrespectively in series.

With the up reversing switch in closed position, it. completes at itscontactors III] a selfholding circuit for-its winding 2, controlled bythe stop switch contactors 90 and 9|, said circuit receiving its feedindependently of the contactors 64 which are in the initial energizingcircuit for said winding and including contactors I06 of switch H. Thisself-holding circuit may be traced as follows: the same as heretoforetraced to a junction I83 with wire83, contactors I85, wire I04, thencethrough contactors III) to wire I which forms a junction with wire 86,thence through the winding 2 and from there on to the minus main by wayof wires 81, 89 which include back-contactors 88, and stop switchcontactors 9| and in series.

The door-lock cam releasing magnet I3 and the operating winding I9 forthe gate releasing rack I8 are connected in parallel by wires 92 and 93respectively fed from wire 94 by way of contactors IUI of whicheverdirection switch is closed, the wire 93 being subject to the effect 'ofhoistway door contactors I I. These parallel wires form afjunction at 95with a wire 96 which connects with the minus main and includes normallyclosed contactors 91 of a timing switch 98 so rendered by providing itwith a dash-pot 99. The

timing switch also controls normally'closedccntactors I88 in the circuitof the winding 6. With this arrangement of circuits, the windingI9'cannot be energized to unlock-the car-gate to'permit its closureunless all the hoistwaydoors are closed and locked, thus there is nodanger of the closure of the gate being-initiated'while a passenger isstepping onto or off of the car. Fur thermore; since the contactors 84are in thefeed circuit of'the reversing switch"windings,= it i'snecessary for all hoistway doors to be in closed and locked positionbefore thecar-can be started. This is so because the closing of thecontactors 84 is dependent'on energization of the winding -I9'and thecircuit for-thelatter cain be closed only'when all the hoi'stway doorsare closedand locked."

The intercepting circuit for the winding 6'- of the switch B may betraced'as follows: from-wire 59, wire 60, wire 5 branching from wire 6|)at the junction 62, the wire'5' including the'floorselector contactors42; 44 and 45 for all landings -(excepting the lower end landing) inseries; and forming a junction at'62 with the wire 5 which extends byway of direction switchcontactoi's I and contactors I00 'ofthe'timingswitch 98, through thewinding 5 to the minus main.' T

The circuit'for the winding 68 of the fast and slow speed switch may betraced as follows: the same as for the reversing -switch winding .up tothe junction 83' and'branching therefromztowire I38 which includescontactors I38 of the change over switch H, contactors 65 towns|0'|,"contactors 61, wire I88;rthrough the winding 68tand by wire I09 tothe minus main.

The feed wire 55 :for theupde energ' ng relay windings 3| is now closedat the back-contactors 55 of the down direction switch which in efiectmeans'that only up" de-energizing contactors 33 and 35 are renderedeffective'and a wire IOGA common to the windings 3| connects with theminus: main and includes the back-contactors I23 in series .of both theup and down'? reversing switches'so that in effect only the windings ofthe .up floor relays which correspond to landings'stopped. at aretie-energized :when *movement'of the car is'in an upward direction. Thedown de-energizing contactors 34 and 35 are rendered ineffective byreason of the feed wire I I I being open-circuited at the up directionswitch contactors 58 so that in effect any down floor-relay switcheswhich are in actuated position as a result of actuating their associateddown push buttons will not be disturbed as by the engagement of thecontactors 34 and 36 while direction for car movement is in an upwarddirectionv excepting .in the case of any down floor-relay switch whichcontrols 'move-' ment of the car to a farthest-up point of dispatch. Asthe back-contactors H2 of the up direction switch are now open, thecircuit for the winding II3 of the down direction switch is renderedinoperative and cannot close so long as the up-direction switch isclosed and in such manner any closed car start contactors 5| forlandings below car position are rendered ineffective. The up directionswitch will remain closed until the car reaches the landing farthest-upfor which an up button is actuated or it will remain closed in responsetoan actuated "down button farthest-up if it is for a landing above saidlanding farthest-up for which the up button is actuated. This is sobecause the floorselector segments 38 for landings above car po sitionare set'to connect their associated wire 52 in'the circuit of the updirection switch winding 64A, said wires 52 for each landing, as will beremembered, connecting the contactors 50 and 5! of both the up and downfloor-relays in parallel.

-Up to the present point-in the description of the operation, the car ismoving upwardly at its fast speed rate, its direction of movementupwardly being originated by operation of the third landing down button;the up de-energizing circuit-sand apparatus being rendered 'effective;the down do-energizing circuits being rendered ineffective; the stopswitches on "the car both in closed position and maintained 1 in 7inoperative or-retracted position mechanicallyoy the springs w, 112' sothat their rollers will not engage cams forthe landings which arenotstopped at, the door-lock cam in retracted position, and the upintercepting circuit rendered efi'ective at :the contactors I, and thedown intercepting circuits rendered inefiective at the contactors 9.-.-As the car moves upwardly from the first to the'third landing, or forthe purpose 'of-descrip. tion at this point let ussay tothe fourthlanding, it will be caused automatically to slowdown and stop inresponse onlyto .fupf push buttons at the landings intermediatethe-position ofthe car and the farthest-'up' landing for .which a pushbutton is actuated and it willbe automatically slowed down andstoppedat? said farthestup landing for which a push button is actuatedregardless as to whethersaid actuated button is an up? or afdown button.Slow-down of the caris eflected at said landings in sucession or intheir natural order regardless of the order in which the push buttonsare actuated, the 'car responding on first approach'to up push buttonsactuated prior to car arrival and on second approach in the up directionto push buttons actuated subsequently to car'arrival. Let us assume now'the second landinguip push button is actuated prior to car arrival.Pressing said button effects energization of the winding for the secondlanding floorrelay switch to cause the latter to close and maintainitself inactuated position through closure of its self-holdingcontactors to close its self-holding circuit. We now have the backcontactors Bl of the up floorrelay switch at. the second landingopen-circuited to open the shunt circuit around the second landingfloor-selector contactors 42, 44 and 45. Hence, whenthe car .actuatesthe second landing selector switch segment 42 to momentarilyopen-circuit contactors M and 65, the series energizing circuit 5' forthe winding 6 is open-circuited and as the second landing shunt circuitis already open, this causes de-energization of the winding 6 to causeoperation of the switch B to open-circuit ils contactors '64 and 65 andclose-circuit its back-contactors 66. Opening of contactors 65de-energizes'the fast and slow speed switch winding 68 to causeautomatic slow-dc-wn due to the closing of the switch J to short-circuitthe shunt-field resistor 13 and the contactors 64 now open the initialenergizing circuit for the reversing switch win-ding, the latter nowbeing maintained energized by the self-holding circuit. Theback-contactors 85 close to cause energization of a winding H4 ofthetiming switch 98 and the winding H5 of the fup stop switch, in series.The circuit'therefor may be traced as follows? from a plus wire I I6,back-contactorsGB, wire 'Hl, winding H4, wire H8, up reversingswitch'contactors ilii, wire"|20,' winding-115,:ar'id by wire l20'-:tothe minus main. It 'will be: mentioned here'that the back-contactors66 close to effect energization of the winding H4 of the relay 98 tocause opening of the contactors I and 91, before the second landingfloor-selector contactors :42, 45 and 4E re-close the series circuit 5for the winding ii. Hence, when slow-down is effected and the secondlanding floor-selector re-closes the circuit 5' for-the winding 6 at thecontactors 42, 45 and dfi', the winding Gcannot receive currentbecauseof its -circuit being'now open at the contactors I00 of thetiniedrelay 98, and in such manner r'e-closur'e of the contactors Gland 65 isprevented at 'this time resulting in the switch J-remaining closed andinmaintaining the initial energizing' circuitfor the reversing switchwinding 2 "open-circuited so that the control of the winding 2 isthus-transferredto the"up stopping switch I in the self-holding circuit0f the winding 2; The stop switchwinding II5 being energized operatesthe closed stop switch 'S so that-itsroller is in positiomforcooperation' with the -fu p 'stop cam" I-. 'When the car has appreciablyslowed down, it bring'sthis roller intoehg-aigement-With the cam -toeffect momentary-opening on the at}; switch contactors '90 'to openthe'='self-holding circuit for the winding 2' of the upreversingswitch.R. and in such 'manner -efliect*st'op ofthe can Eachstep cam is peaked: to effect only momentary openingof the stop switchcontactors and with the car substantially levelwith the landing, theswitch roller is out of-engage'me'ntwith' the cam' and the 7 switchcontactors are closed. I 'As' will be evident the stop switch winding llfiand also the winding H4 are'de-energized by opening of the --up-reversing switch contactors H9 and the light spring a: actuates' thestop switch to close its contactorsand atthe-same time the spring woperates to'retract its roller;

The initial-energizingcircuit heretofore traced for the winding- 13 forthe door-lockfcam and the gate latch releasing winding. I9 is by way ofthe lcontactors'c91iof the time:switch-98. However, when a reversingswitchcloseait closes'itsvcontactors 12]: to complete by way of wire-I02 branching from the wire 96 ata junction 96, an energizing circuitfor said windings independent. of.:the contactors 91, the effect ofwhich fmore essentially is to prevent opening of the contactors 84 untilstop is efiected'instead of when slow-down is effected at whichtime theinitial circuit for said windings is opened at the contactors 91 'of thetime switch 98. Hence, when stopis effected-the windings I3 and I9.are-both'de-energized by opening of the reversing switch contactors l2!and'the door-lock cam will assume its operative position to unlock thehoist- .way door. The gate rack I8 will open its con- 'tactors 84and-imdoing so will assume a position to'cooperate with the latch I! onthe car gate when the latter is'opened to maintain the gate in its openposition against the'action of the gate 'closi'ngspring It.

The car is now at rest at the second landing and with bothreversing-switches in openposition they close the two' sets of backcontactors l23in series, which together with'the contactors 33 and 35 atthe second landing and back contactors 56- of the downdirection switch;complete an energizing circuit for the winding 3i for the second landingThewinding 3] being energized causes contactorsr-TF-tobe open-cir.cuited thereby. openingfthe =self-holding circuit --fo'r the. winding.24 ioflthe second landing-711001.-

relay switch 22. In this manner thesecond landing floor-relay switch ispermitted to-return to normal position. As soon asthe car is started,the backcontactors .123 of the up reversing switch will be-opened tocause de-energization of the second landing winding 3-! to permit itscontactors .21 to close=and thus condition-the circuit forthe winding ofthe second landing floor-relay switch so that itwill be completedbyvactuation ofthe up push button at any time after the car has startedaway from its landing in either. direction;; ;,a The completedenergizing circuit for the second landing winding. 3| may be traced asfollows; from: a pluswire124, back contactors 56 of the switchD',-,wire,-55, to second landing con- :tacton 33,;contactor ;35,.-wir eI 25, through winding 3|,wireyl26 toa-common return wire (06Awhich-;connects with the; minus'main and includes the ;,two sets ofbaclo contactors I23 in series of the-reversing switches R,-.-R'-. q

The winding ;l M of the time-limit relay is deenergized by opening ofthe up reversing switch contactors. H9 and thus closure of thecontactors Hi0 and 91 is-initiated at isuch time -By adjustment of the.dash pct, 98; which retardsthe closure of E the contactors I I 00 and;91,- areasonable stopping period is provided to permit-passengers to getoff of and "onto the car platform. At the expiration-of such-periodthese contactors close-and initiate start of thecar. providedall doorsand the carfgate are :closed, and-regardless 'as' to whether either hadfirst been opened which in effect means that for eachzcar stop it isnot-necessary inorder to render'the system again operable to re-startthe car, that the car gate or hoistway door. be first openedwhichoperation, of course, is not effected naswhen- ,ahall passengerdispatches the car. but does-notuse it, or a car passenger delaysinopening the car gate. Hence, since we already have-,the'energizing'circuit 5' for the winding 6 closed-up to the contactors I00, theclosing of the latter; completes the energizing circuit for the:winding-6 and the switch --B will close its contactors wand 65 and openits back contactors 66.; The contactors 91. close to comvplete'thecircuit for the. winding [3 of the doorlocl: cam. With 'all the hoistwaydoors closed and locked, the .car gate if not already closed, will be'unlatched by energization of the winding l9 and closed by the action ofthe gate-closing spring l6.

Since the energizingcircuit for the up direction switch winding ismaintained by the down floor relay switch contactors 5|, etc. for thethird landing during :the stop of "the car at 'the second landing, this"up direction switch will remain closed during such intermediate stop atthe second landing. .-Hence, the original di rectiofi for car movementis maintained so that with the initial energizing'circuitfor the upreversing switch winding! again closed at the contactors 64, the closingof the car gate contactors and thecontacto'rs-M will complete theenergizing circuit for winding 2 and in such manner, the up reversingswitch is caused to close to continue movement of the carupwardly or inthe original direction in which it was traveling as when intercepted,and the fast and slow speed switch will operate, in sequence ashereinbefore mentioned to cause movement of the car at fast speedrate.

"Since movement of the car upwardly to the farthest-up landingfornwhicha-button is actuated, is under the control of:a=down push button, whichconditionis assumed in the .present instance, the slow-down of the carat such landing is effected by opening the up direction switch byde-energization of its winding at the third landing floor-selectorcontactors 38, 40, 42 which are timed to be open-circuited when theslowdown point is reached in the same manner as are the contactors 42,44 and 45. Since the third landing contactors SI and associatedfloorselector contactors 31, 38 and 39 are the final feed for the updirection switch winding, or in other words constitute the farthest-upfeed therefor, said winding will be de-energized to open its contactorsl, 1 and I!!! and close its back contactors 58 and 2, when the caractuates the floorselector switch at the third landing to open circuitcontactors 38 and 39.

1 The opening ofcontactors i results in opening at that point theenergizing circuit for the winding- 6 which in efiect causes automaticslow-down of the car at'said farthest-up landing for which a push buttonisjactuated. It will be particularly pointed out here that when the caris moving upwardly and a down push'button through its control. of the updirection switch controls its movement to a farthest-up landing forwhich a button is actuated, the up intercepting wire 5 as controlled bythe floorrselector switch for the third landing cannot be depended uponto effect automatic slow-down at; such point because the shunt circuitaround said floor-selector switch is closed at contactors 6i and henceunder such condition, the up direction switch is utilized to effectautomatic slow-down by open-circuiting the wire 5 at contactors 1. Sincefor upward movement of the car, the up direction switch is maintainedclosed uninterruptedly or regardless of the number of intermediate stopsuntil the farthest-up point of dispatch is reached, the slowdownoperation through the agency of said switch is efiected by a down pushbutton only at said farthest point and only when the down buttoncorresponds to a landing above the farthest-up landing for which an upbutton is actuated. Hence, during said upward movement of the car itwill not be responsive to actuated down buttons for landings below saidfarthest point of dispatch because the down intercepting circuits 8 and8', etc. are open-circuited or rendered inoperative at the-contactors 9of the down direction switch.

Opening of contactors l by the direction switch opens at that point theinitial energizing circuit for the winding 2 of the up reversing switchbut the circuit for said winding is now maintained by way of itsself-holding circuit which is independent of said contactors l and iscontrolled by the contactors of the stopping switches S and S in series.Closure of the contactors 66 :results in energization of the windings H4and I IS in series and the latter will actuate its switch S with itscontactors in closed position so that the roller is'in operative or camengaging position. Hence, by co-action of the roller and cams,

the stop switch is momentarily actuated to open its contactors to efiectcar stop, etc.

When the up direction switch opens, it breaks at its contactors IGI theenergizing circuit for the windings l3 and I9. However, under suchcondition the circuit 94 therefor is maintained by feeding it fromcontactors l 21 controlled by the reversing switch as they connect itwith wire 94 by way of a wire I28. More essentially, the effect ofmaintaining circuit 94 is to prevent de-energization of the winding l9to open contactors 84 when SlOWfdOWIl is efiected as in this case by adirection switch since said contactors 84 are in the circuit of thereversing switch windings and must not be opened until stop is efiected.

We now have the car at rest at the third landing or, in other words, thefarthest-up landing for which a button was pressed.

Both direction switches are now in open position and under suchcondition any floor-relay switch for a landing below car position, whichis in actuated position will initiate movement of the car downwardlyregardless of whether such actuated switch is an up or a down switch.This is so because each segment 38 below car position connects both itsup and down parallel connected car start contactors 5i) and 51 in thecircuit of the down direction switch winding H3. Hence, the closing ofcontactors or 5! of any of such floor-relay switches effectsenergization of the down" direction switch so that in effect the carupon completing its "up trip to a farthest-up landing for which a but--ton is actuated will at theexpiration of the stop period as controlledby the time-limit switch 98, and provided all hoistway doors are closedand also the car gate (which if not already closed will be automaticallyclosed by closing the hoistway door), be caused to reverse its movementand travel downwardly. Such down direction switch will be maintainedclosed uninterruptedly regardless of the number of down stops until thecar completes its trip to a landing farthest down for which either an upor a down button is actuated.

Let us assume that the button at the first landing is actuated, say, forexample, at a time when the car is making its upward trip in response tothe third landing down button. Actuation of said first landing buttoneffects actuation of its associated floor-switch to close its topcontactor and open its bottom contactors 6|. Since the wire 54 is openat the back-contactors H2 when movement of the car is upwardly suchclosure of said floor-switch at such time is ineffective to influencethe down direction switch. However, when the up direction switch closesits back-contactors H2, they together with the first landing floor-relayswitch contactors SI and the floor-selector contactors 38, 39 and 4! forsaid landing complete an energizing circuit for the clown directionswitch. Now when the time-limit switch again closes, the switch B isclosed to initiate start of the car downwardly and effect operationthereof at its fast speed rate. The car when moving downwardly can beautomatically slowed down and stopped only in response to actuated downpush buttons in a manner effected by the down set of interceptingcircuits consisting of the wires 8 and 8' and their associated shunts,and the stop switch S. Of course, as hereinbefore mentioned, if afarthest-down actuated up button for a landbelow the farthest-downlanding for which a down button is actuated, it willbring the car to itslanding and effect automatic slow-down and stop thereat by opening thedown direc tion switch. For movement of the car downwardly the up startcircuits as controlled by the contactors 5B are rendered inoperative byreason of their common return wire 53 being open-circuited at theback-contactors 81 of the down direction switch, and the up set ofintercepting circuits 5, 5' etc. are rendered inoperative by reason ofthe wire 5 being open-circuited at the contactors l of the switch D. The

"down de-energizing apparatus and circuits are rendered effective byreason of the feed wire Hl being closed at the back-contactors 58 of theswitch D, and the similar apparatus and circuits for up direction arerendered ineffective by reason of the feed wire 55 being open-circuitedat the back-contactors 56 of the switch D.

From the description already given, it will be seen that any up or down"push button actuated after the car has moved downwardly from itslanding, will condition the system to initiate movement of the carupwardly when the car completes its downward trip. With the car movingupwardly to a farthest point of dispatch only up push buttons areeffective to intercept it at landings intermediate car position and suchfarthest point regardless of whether the actuated buttons therefor areup or down. buttons and the car is automatically slowed down and stoppedat said farthest point by either the up or down button therefor.

Any up" or down push button actuated after the car has moved upwardlyfrom its landing, will condition the system to initiate movement of thecar downwardly when the car completes its upward trip. With the carmoving downwardly to a farthest point of dispatch only down push buttonsare effective to intercept it at landings intermediate car position andsuch farthest point regardless of whether the actuated button thereforis an up" or down button and the car is brought to said point andstopped thereat by either the up or down push button.

If a down push button is the initiating button for movement of the carupwardly it will stop the car at its landing on first upward approach ofthe car thereto if a button for a landing farther up is not actuatedprior to the car reaching said landing. This is so because the updirection switch is under control of a down button, and under suchcondition opening of said direction switch is depended upon to initiateslow-down and stop at the farthest point of dispatch and, hence, saidswitch will open to efiect stop at the landing corresponding to saiddown button if the latter constitutes the farthest-up feed for thewinding of said direc tion switch. However, actuation of any button fora landing above-the one corresponding to said down button, will ineffect provide a feed for said winding which maintains the directionswitch closed so that the car on its first approach to the landingcorresponding to said down button will not stop thereat. However, by thesingle actuation of said down button, it will be effective when the carcompletes its upward trip, to initiate movement of the car downwardlyand stop it thereat on such return or reverse trip of the car.

If an "up push button is the initiating button for movement of the cardownwardly, it will stop the car atits landing on first downwardapproach of the car thereto if a button for a'landing farther down isnot actuated prior to the car reaching said first-named landing. This isso because the down direction switch is under control of an up buttonand under such condition, opening of said switch is depended upon toinitiate slow-down and stop and hence said switch will open to effectsuch result at the landing corresponding to said up button if the latterconstitutes the farthest-down feed for the winding of the down directionswitch. However, actuation of any button for a landing below the onecorresponding to said "up" button will'in effect provide a feed fartherdown for said winding which maintains the direction switch closed sothat the car on first approach to the landing corresponding to said up"button will not stop thereat. However, by the single actuation of saidup" button it will be effective when the car completes its downward tripto initiate movement of the car upwardly and stop it thereat on suchupward or return trip of the car.

The car push button and. the hall push buttons which correspond as toand to direction, are connected in parallel so that the car pushbuttonswill in sheet control the car in the same manner as do hailbuttons. Hence, in view of the detailed description already given forhall'button operation, a detailed description for car button operationis thought unnecessary other than to point out that the car passengersneed only to press the car buttons of the or down" banks in accordancewith the direction inwhich it is desired to travel and for thelanding'to which travel is desired and the control elements will have amode of operation the same as described for the hall button operation.For the same reason it has not been thought nec essary to encumber thedrawings with a complete diagram of the connections from the car but-'tons; As these are in parallel with those from the hall buttons, theirinclusion would be mere duplication which would tend to confusion raiher-tha n clarification of the drawings.

Provision is made for returning the car repeatedly to a predeterminedlanding home station automatically, or without necessitating actuationof any push button. result in a manner so that any landiselected as ahome station, a knife-switch A is provided for each desired landing,switches located for manual operation at any convenient point and eachswitch for each intermediate landing lay-passing the buttons thereforand feeding both floor-relay switch windings 24 in parallel by way of awire llZBA and parallel wires IZIA.

The knife-switches are normally in open position so that by closing onecorresponding to a landing selected as the "home station. the energizingcircuit for the two windings 2 corre sponding to said station will becompleted independently of the push buttons for said station.

In effect then the two floor-relay switches 2': and

23 for the home station will be maintained closed so long as the switchl25A remains in closed position excepting as each is opened only inaccordance with the direction of car movement by operation of thede-energizing apparatus when the car is at said home" station, and theone so opened being again automatically closed as the car moves awayfrom the station. Hence, by so maintaining the two floor-relay switchesclosed for the home station, the car will be repeated- Lv returnedthereto automatically or independently of button operation, altercompleting its trip to the farthest-up and farthest-down points ofdispatch and stopped at said home station on approach from eitherdirection.

Since the knife-switches iEEA all control circuits of a similar natureonly two are illustrated herein, one for the third landing and the otherfor the first landing, the latter, of course, since it is for an endlanding, controlling only the one floor-relay switch therefor. It willbe evident that with the knife-switches closed for all landings, the carwill be caused to travel repeatcdiy between the end landings and makeall stops when traveling either direction, and th-ecar will not bestalled for allure to open the door at any landing stopped at, becauseof the provision of the time-limit switch.

For car switch operation, the car switch G is provided. For conveniencethis is illustrated away from the car. It has up and down" cont-actors(28A and 129A respectively and also speed control contactois in paralleladapted for coaction with a car switch segment 31 normally maintained inneutral or off position by a usual type of interlock for the car switchlever such, -f l 'r example, as is illustrated at B2. The segment (3| ismounted so that its center of gravity is I above the pivotal supportingpoint so that when it is in on or running position, the-operator canrelease the lever and the segment' vriil be maintainedin actuatedposition by gra 'ity; An interlock such as I32 is preferably provlded'to lock the car switch lever in either of its "011 positions.

For car switch control, the change-over knifeswitch H is thrown from itsposition as illustrated to engage lower contactors 133. Thisopen-circuits the wires 53 and 54 in the circuits of direction switchwindings 65A and H3 respectively and this makes the car start anddispatch funcfion-by the car and hall push buttons inoperative. Theenergizing circuit for the 68 of the switch 3 is also conditioned to besubject to the control of the car switch as-well as to thecontrol of theautomatic speed change'switch B, and the self-holding circuit for thereversing switch windings is also conditioned for control by the carswitch. In this manner the car starting or dispatching function istransferred to the car switch so that operation of the segment l3i to'close-circuit'contactors H9 and l29A, closes an energizing circuit forthe winding H3 of the down" direction switch to efiect movement of thecar downwardly. Operation of the segment 3! to close-circuit contactorsI29 and l28A closes an energizing circuit for the winding 64A of the up"direction switch to efiect movement of the car upwardly. Wln'cheverdirection switch is closed, functions in the same manner'as heretoforedescribed to establish and maintain direc tion for car movement so longas the car switch remains in on" position, and also renders either theup" or down" car and hall push buttons effective to intercept the car,and makes the deenergizing apparatus for the floor relay switcheseffective. As hereinber'ore pointed out, the dispatch or car startoperation as controlled by said buttons through their control of thedirection switches is rendered inoperative. Hence, for car switchoperation said car and hall push buttons function only to intercept thecar by efiecting automatic slow-down and stops but direction for carmovement through control of said direction switches is under control ofthe car switch.

With the present arrangement the car operator needs only to move the carswitch lever to set the segment at will to 'eficct movement of the carat slow or fast speed in a desired direction.

The operator can then release the actuating lever to permit the segmentto be maintained in actuated position by the action of gravity during anentire trip in any one direction regardless of intermediate stops anduntil it is desired to reverse movement of the car. Hence, each start ofthe car from a landing at which it is intercepted is effectedautomatically by operation of the timelimit switch or by closing thehoistway door and car gate if they should be in open position afterclosure of said time-limit switch. The car operator simply actuates thecar push buttons in accordance with the calls given by the carpassengers, and automatic slow-down and stop in response to actuated carbuttons and also in response to actuated hall buttons is effected in thesame manner as hereinbefcre described.

Through the intermediary of the car switch control of the directionswitches, the reversing switches can be controlled to start, stop andreverse the car at will at any point intermediate the limits of carmovement. Since the fast and slow speed winding 68 is fed by way of thecar switch contactors 30 and the contactors 65 of the switch B in seris, the fast speed and slowdown operation can be effected manually by carswitch operation. Or the car switch can remain in fast speed position sothat slow-down and stop is efifected automatically by the opening ofswitch B in response to actuated car and hall push buttons.

With the change-over switch thrown over as suggested, a car switchcontrolled circuit, say for example for the winding 84A of the up"direction switch, may be traced as follows: from a plus wire lEt throughcar switch contactors to wire 7 I35, through change-cver'switch to wireI36, thence through winding 84A and from there on to the minus main asheretofore trace-:1.

A circuit for the winding 68 of the fast and slow speed switch J may betraced as follows: wire 34 through fast speed contactor ISO to wire I3?by way of the segment I3! and feed contactor $29, through change-overswitch to wire I38, contactors 65 of the switch B, wire IN, contactors6?, wire #38, winding 68 and thence to the minus main by wire 69.

With the switch H thrown over to its lower position, the self-holdingcircuit for the reversing switch windings as controlled by wire 564 isopencircuited at the contactors 138 and transferred to the car switchcontactors I68. Hence, rendering said self-holding circuit inoperativeat the contactors lot and subjecting it to control of the car switch,means in eiiect that car stop at any point can be efiected by centeringthe car switch to open-circuit said self-holding circuit so that openingof a direction switch will tie-energize the winding of the reversingswitch. Or by leaving the car switch in "on" position said self-holdingcircuit is opened automatically by the stop switches to effect car stopsin response to car and hall push buttons in the same way as hereinbeforepointed out.

By the provision of a, knife-switch I58 to be located in the car (butshown elsewhere for convenience), the car can be caused to operate asexpress and will be non-responsive to actuated push buttons but will besubject to control by the car switch exclusively to control its startsand stops. The knife-switch I58 in the position as shown is in theintercepting energizing circuit of the winding 6 so that the switch B issubject to the control of the push buttons. However, by throwing theswitch to engage contactor I 59, the winding 6 is thereby renderednon-responsive to the push buttons, and is placed directly across theline so that the switch B will remain closed so long as the knife-switchengages contactors I 59. Slow-down, stop and start is then controlledexclusively by the car switch. This arrangement is desirable moreparticularly for the reason that if the car is loaded to capacity,overcrowding the car with accompanying loss of time is eliminated by sorendering the system nonresponsive to the push buttons, but the operatorhaving exclusive control of the car, can let any car passengers oil atany desired points of operation of the car switch.

A single push button intercepting system for a multi-speed elevator asillustrated in Fig. 2 comprises one push button I56 located at eachlanding and one for each landing designated H58 located on the car.These car and ball push buttons which correspond as to floors areconnected in parallel to control their associated floor-relay switchesI41. There is only one floorrelay switch for each landing. Forintermediate landings each switch is provided with two sets ofback-contactors 6 I, 6 I which together with the floor-selectors I48control the intercepting slowdown operation of the car through controlof the two sets of intercepting wires 5, 5' and 8, 8 for movement of thecar upwardly and downwardly respectively through the agency of the fastand slow speed-switch whose winding 6 only is shown. The floor-selectorswitches I48 are of the same construction as in Figs. 1A and 1B and havea mode of operation the same as described for Figs. 1A and IE, tocontrol their respective circuits. However, for the single push buttonarrangement, only a single set of de-energizing mechanism is provided;comprising for each landing a movable contactor I49 and its coastingcontactor I59 together with a de-energizing relay I52. The contactorsI49 are in parallel and are fed directly from the plus main by wire I56.The contactors I are connected in parallel by a common return wire I5Iwhich after passing through reversing switch back-contactors #23,connects with the minusv main by'wire I51. The up" and down"intercepting wires 5' and 8 are controlled by the up and down" directionswitch contactors I and 9, as in Fig. 1A,

Only that portion of the system which involves changes over the Figs. 1Aand 13 two but-ton arrangement has been illustrated in Fig. 2, thecircuits and apparatus not illustrated in the Fig. 2 arrangement beingthe same as in Figs. 1A and According to the mode of operation of theFig. 2 arrangement the pushbuttons are actuable at any time regardlessof the position of the car and the direction of car movement to effectactuation of their associated floor-relay switches to open theirintercepting contactors and close their two sets of top contactors I52and I53, the former to feed circuits I54 for the direction switchwindings in accordance with car position as determined by the positionof the floor-selector segments 38, and the latter to control theself-holding circuits.

During movement of the car upwardly, it will respond to any actuatedpush buttons for landings toward which it is moving and will respond toa farther-up actuated push button before reversal of car movement iseffective. For downward movement of the car it will respond to anyactuated push button for landings toward which it is moving and willrespond toa. farthest-down actuated push button before reversal of carmovement is effective.

Of course, as will be evident the single push button arrangement doesnot offer hall passengers any selection in the matter of interceptingthe car only when it is going in the desired direction as does the twobutton arrangement. The single button arrangement is consideredsatisfactory where inter-floor travel is infrequent, but for the b classof service where inter-floor travel is frequent, the single buttonarrangement through its lack of selection would promote confusion andcongestion in the car, whereas the two button arrangement because of itaiiording selection to the hall passengers effectually prevents suchconditions by segregation of up and down going hall passengers.

In the Fig. 4 arrangement the series and shunt system of circuits isretained to intercept the car by efiecting automatic slow-down as in thearrangement shown in Figs. 1A and 1B, But the mechanism to control thecircuits, consisting of car controlled apparatus as a whole designatedby "32A together with up and down floor-relay switches designated by 63and I64 respectively for each intermediate landing, are of asubstantially different construction with a substantially difierent modeof operation as compared with the corresponding elements of thearrangement shown in Figs. 1A and 1B, but the results so far as controlof the car is concerned, are the same in both cases.

Each floor-relay switch is of a type employing a trip winding which bybeing energized momentarfly in response to momentary actuation of itsassociated push button, moves an interlocking arm from engagement with apivoted switch in the form of a bell-crank iiii so that the latteroperates through the action of gravity, or a spring (not shown) to opennormally closed contactcrs I68 to control anintercepting shunt circuitand closes normally open contactors its to control a car start circuitthrough control of up and down direction switches in the same manner asdo the corre sponding contactors in the Figs. 1A and 1B arrangement. Thefloor-relay switch arm, it will thus be seen, is maintained in actuatedor set position mechanically as contra-distinguished from the Figs. 1Aand 1B arrangement in which each floor-relay switch is maintained inactuated position electrically through the intermediary of aself-holding winding and circuit, said winding serving to initiallyactuate or set the switch in response to momentary actuation of itsassociated button in addition to maintaining it in said actuated or setposition. A winding I10 operates when energized as, for example, whenits associaficd sw tch effects stop of the car, to re-set or, in otherwords, rock its switch arm to an inoperative or normal position in whichit is maintained by the interlocking arm 166.

The car-controlled mechanism to control the up and down interceptingcircuits is of a type remote from the car and comprises for eachintermediate landing normally closed contactors ill and 5'52 carried bypivoted switch arms I73, H3 respectively, the contactors H! beingconnested in series and controllable to intercept the car when it istraveling upwardly, and the contactors I12 connected in series andcontrollable to intercept the car when it is moving downwardly. The upand down switches are provided with rollers H4, H4 respectively, thoseforming the up set being adapted for engagement by a cam H5 and thoseforming the down set being adapted for engagement by a cam I16. The camsare movable together axially on a worm H! rotatable by movement of thecar through a cable and drum connection I18. By coaction of the camswith the switch rollers, the switches are opened only momentarily andare again re-closed, which results are obtained by the directly actuatedhoistway type of switches illustrated in. Fig.

1B, and the other modified remote type of floorcontroller or selectorillustrated in Fig. 3.

A standard and well known type of remote control mechanism I79 may becoupled with the worm for actuation therewith in accordance with themovement of the car. This mechanism together with the floor-relaycontactors 559 function to control the direction switches.

The up and down car start co-ntactors 153 for each floor are connectedin parallel and the common wires I85 leading from each set connect thetwo sets of corresponding contactors such l8! and MI at the remotecontroller Sit: in par allel by a wire 580 so that in effect the car canbe brought to the landing from either direction by pressing either theup or down button thereat.

Circuit-controlling mechanism to co energizing circuits for the re-sctthe floor-relay switches is of the norma -y 0pencircuited type andconsists of the up and down sets of fixed contactors 82 and. 83respectively adapted for engagement by up and down contactors I84 andS85 respectively mov ablewith the axially movable cams.

By extending a common return wire E86 which connects with the contactori234, through back contactors It! of the down direction switch, andextending the common return wire E8! which connects with the contactorI85, through back contactors 988 of the/up direction switch, and thenextendinga wire I89 connecting both sets of back contactors in parallel,through back contactors Hi5 and IS! in series of the up and downreversing switches, the efiect will be such that only up floor-relayswitches for landings stopped at will be re-set when movement of the caris upwardly and only down floor-relay switches for landings stopped atwill be re-set when movement of the car is downwardly, and when the carreaches a farthest point of dispatch in either direction, either one orboth of the floorrelay switches corresponding thereto will be reset.

The modified construction of the intercepting control mechanism 162A andthe floor-relay switch mechanism I53 and IE4 does not necessitate anychange to the system of electrical circuits as illustrated in Figs. 1Aand 1B, for effooting the intercepting operation and to control start ofthe car by push button operation, and hence in Fig. 4 only such portionof said circuits is embodied therein as is thought necessary in orderthat the modified elements can be readily identified in association withtheir particular cir cuits. The intercepting and car start circuits areunchanged; hence, a detailed description thereof is thought to beunnecessary. With regard to the mode of operation of the floor-relayswitches, it is sufficient to state that any of them are actuable to beset in response to momentary actuation of their associated push buttonsby energization of their associated trip magnets at any time regardlessof the position of the car and the direction of car movement at the timethey are actuated.

The re-set magnet for any particular floorrelay switch which effectsstop of the car is energized by way of a wire I92 which connects with aplus main; thence through the re-set magnet of the up" or downfloor-relay switch which stopped the car (and for the sake ofillustration, it will be assumed that the up floor-relay switch !93which corresponds to the third landing is the one to effect the stop)wire i5 4, contactor 82 for said landing to movable ccntactor l84, wireI86, back contactors I81 of the down direction switch, and thence bywire I89 to the minus line by way of the back contactors I96 and IQ! ofthe reversing switches.

Referring back to the arrangement illustrated in Figs. 1A and IE, itwill be particularly noted that when up car movement to a farthest-uppoint of dispatch is under control of a down push button, or to be morespecific, its associated down" floorrelay switch, the latter will bereturned to normal position or if both floor-relay switches for suchpoint are in actuated position, both will be returned to normalposition. Likewise when down car movement to a farthestdown point ofdispatch is under control of an up button or up floor-relay switch, thelatter will be returned to normal position, or if both floor-relayswitches for such point are in actuated position, both will be returnedto normal position. This is so because with the car stopped at either ofsaid farthest points both direction switches are in open position andclose their back-contactors 58 and 56 to close both feeds l H and 55 forthe de-energizing windings 3| and 32 1 respectively and both the up anddown sets of contactors 33 and 35, and '34 and 36 respectively are inengagement. In such manner the energizing circuits for both windings 3|and 32 are completed and both sets of contactors 21 and 29 will thus beopened to effect return to normal positions of whichever one of thefloor-relays is in actuated position, or both if both are in actuatedposition.

By including the circuit for the up direction switch winding throughback-contactors I95 of the down reversing switch, and including thecircuit for the down direction switch winding through back-contactorsI96 of the up reversing switch, and by providing each direction switchwith a dash pot 97, a direction switch cannot start its closing movementin response to an actuated button to condition the system for reversecar movement until stop of the car is effected, and then by retardingsuch closing movement of a direction switch and arranging one of theback-contactors of each direction switch to have a short follow-upmovement, said contactors 58 and 56 together with their associatedcircuits, etc., will thus be given suflicient time to function to returnthe floor-relay or relays for such farthest point of dispatch, to normalposition before final closure of such direction switch, which finalclosure of the latter will, of course, open-circuit its back-contactors.

This invention in its embodiments as either a two button or singlebutton arrangement for a multi-speed elevator is an improvement oncopending applications, one by the applicant, Serial No. P7522, filedAugust 6, 1926, now Patent 1,983,748, and one by Carl Erickson, SerialNo. 146,609, filed November 6, 1926, both of said inventions and thepresent one also, assigned to the Gurney Elevator Company. In saidco-pending applications only the hall push buttons at landings towardwhich the car is moving are effective to actuate their floor-relayswitches which means that the push buttons at landings which the car ismoving away from if actuated at such time would be ineifective, that is,they would not set their floor-relay switches so that in efiect suchbuttons would need to be actuated a number of times, whereas in thepresent application any of the push buttons are actuable at any time andneed to be actuated only once in order to effect response of the carthereto. In the present case, car switch control of the car does notinterfere with the setting of any of the push buttons, whereas in saidPatent 1,983,748, reversal of the car by car switch operation will ineifect open any actuated floor-relays for landings toward which the cartravels.

Furthermore, the present two button arrangement is a distinctimprovement on a single button arrangement for reasons hereinbeforementioned.

What I claim is:

1. A control system for an elevator car comprising control means at eachof a plurality of landings for controlling both starts and stops of thecar, car carried means for controlling car starts and stops, and meansfor rendering either the car carried or the landing car start controlmeans effective to the exclusion of the other, and retaining the carstop function of both landing and car carried controls when the carstart function of the landing controls is rendered ineffective.

2. A control system for an elevator car comprising control means on thecar operable at will to stop movement of the car and cause reversemovement thereof, and means for each of a plurality of landings to causeboth start-and stop of the car, and means to condition said landingcontrol means to control only car stops while simultaneously renderingthe car carried control means effective to start the car, any of saidlanding control means at the landings requiring actuation only once toeffect response thereto regardless of the direction of car movement whenactuated.

3. A control system for an elevator car comprising a plurality ofcontrol means at each of a plurality of landings, any of said controlmeans actuable at any time regardless of car position and direction ofcar movement, a circuit for each control means effective to maintainsame in actuated position, and means responsive to stopping of the car,the direction of travel of the car prior to stopping, and the positionof the car with respect to a floor landing, only, efiective to return tonormal position only such actuated control means as cause the stop ofthe car without affecting other actuated controlmeans.

4. A control means for an elevator car comprising controlinstrumentalities therefor at each of a plurality of landings, eachcontrol including a winding and an energizing circuit therefor, car &

stopping means rendered effective by energization of any of saidwindings, normally closed contactors in each of said circuits, and meansresponsive to direction 06 car travel, and the position of the car withrespect to a floor landing effective to deenergize the winding only ifand when the car stops at the landing with which said contaetors areassociated and in response to energization of said winding.

5. A control means for an elevator car comprising a floor relay having awinding, a circuit therefor, said winding being energizable at any timeregardless of car position and direction of car movement, car stop meanscontrolled by said relay, means for maintaining said winding energizeduntil said relay effects car stop, and means for deenergizing saidwinding when the car stops in response to operation of the car stopmeans acting under the influence of said relay, said deenergizing meansfor the relay winding being responsive to stopping of the car, thedirection of travel of the car prior to stopping, and the position ofthe car with respect to a floor landing, only.

6. A control system for an elevator car comprising up and down controlsat each of a plurality of landings to control the car, any of saidcontrols actuable at any time and maintained in actuated positionelectrically until response is made thereto, a (fie-energizing windingfor each of said controls, a feed circuit common only to uptie-energizing windings, a feed circuit commen only to down e-energizingwindings, supply mains, means to condition only said up feed circuit forconnection to said supply mains when movement of the car is upwardly,means to condition oniy said down feed circuit for connection tosaid-supply mains when movement of the car is dowmvardl y, meansresponsive to stopping of the car, the direction of travel of the carprior to stopping, and the position of the car With respect to a floorlanding. only, for selectively connecting the up and down deenergizingwindings oi actuated floor landing controls to. said supp y-ma n -7. Anintercepting push button control system comprising a ficor relay switchhaving a winding and an energizing circuit therefor opened only when.the car is at the landing corresponding to said switclrwhereby saidswitch is maintained closed to cause return movement of the car to itslanding repeatedly independently of manual operation.

8. An intercepting circuit comprising a car actuated switch for each ofa plurality of landings, said switches being connected in series andsaid series circuit being completed through all of said car actuatedswitches when the car is at any landing, and a shunt around each of saidswitches operable to be opened at any time regardless of the position ofthe car and the direction of car movement.

9. An intercepting circuit comprising a carcontrolled switch for each ofa plurality of landings, connected in series, a shunt around each ofsaid switches, and electrical means controllable manually to controlsaid shunts selectively at any time regardless of the position of thecar and the direction of movement of the car.

10. An intercepting circuit comprising contactors for each of aplurality of landings forming a series circuit which is opened by thecar only momentarily as it approaches each landing and is re-closed bythe car so that with the latter at any landing, said series circuit iscompleted by way of all of said contactors.

11. -An intercepting circuit comprising car actuated switch mechanismfor each of a plurality of landings, said mechanisms together forming aseries circuit, a shunt circuit around said switch mechanism for eachlanding, and a winding controllable by said series and shunt circuits,so that start of the car from each landing stopped at is effective byenergization of said winding by said series circuit independently ofsaid shunt circuits.

12. An intercepting circuit comprising car actuated switch mechanism foreach of a plurality of landings, said mechanisms together forming aseries circuit, a shunt circuit around said switch mechanism for eachlanding, a winding controllable by said series and shunt circuits sothat start of the car from each landing stopped at is effective byenergization of said winding by said series circuit independently ofsaid shunt circuits, and a time-limit switch in said series circuit.

13, A control system for an elevator car comprising a control for eachof a plurality of landings, a car switch efiective to start and stopthecar at will, said controls effective with the car switch in on positionto intercept the car at their landings, and means to render saidcontrols inefiective so that the car switch operates exclusively tocontrol the car without rendering said controls non-actuable.

14. A control system for an elevator car comprising a control for eachof a plurality of landings, said controls having combined dispatch andintercepting functions, and means to condition said controls to beeffective only to intercept the car, or to be ineffective with respectto both their dispatch or intercepting functions without rendering saidcontrols non-actuable.

15. In combination, an elevator car, a car gate, hoistway doors andcontactors controlled thereby, and means operable automatically to causeclosure of the gate only when all of said hoistway door contactors areclosed.

16. In combination, an elevator car, a car gate having a closertherefor, a device to maintain said gate in open position against theaction of said gate closer, an electro-responsive device operativelyassociated with said maintaining device, and a time-limit switcheiiective at the expiration of a predetermined period of time after eachstop of the car, to energize said electro-responsive device to controlsaid maintaining means so that the gate closer is rendered effective toclose said car gate, and automatically to start the car.

17. In an elevator system, an elevator operable past a plurality offloors, a closure for said elevaior, means biasing said closure toclosed position, means operable when said closure is opened formaintaining said closure open against the effect of said bias, and meansoperably responsive to the position of said elevator for rendering saidmaintaining means effective only when said elevator is adjacent to anyone of said floors.

18. In an elevator system, an elevator operable past a plurality offloors, a closure for said elevator, means biasing said closure toclosed position, means operable when. said closure is opened formaintaining said closure open against the effect of said bias, and meansoperably responsive to the position of said elevator for rendering saidmaintaining means effective only when said elevator is substantiallylevel with any one of said floors.

19. In an elevator system, an elevator operable in a hatchway pastaplurality of floors, a gate for said car, a closure for said hatchway ateach of said floors,- means biasing said gate to closed position, meansfor holding said gate in open position when so moved, means forreleasing said holding means, and means operable by movement of any ofsaid hatchway closures for preventing actuation of said releasing meanswhile said closure is open.

20. A control means for an elevator car comprising a floor relay havinga winding, a circuit therefor, said winding being energizable at anytime regardless of car position and direction of car movement, car stopmeans controlled in part by said relay, car operated means alsocontrolling said car stop means, and means responsive to direction ofcar travel and actuation of said car operated means for deenergizingsaid winding, rendered effective to reset said relay only when the carstops at said landing in response to operation of the car stop meansacting under the influence of said relay.

21. In combination, an elevator car, a car gate manually movable to openposition, means for holding the door in open position when so moved, acloser for the door, contactors controlled by the door, a car startcircuit including said contactors and a time-limit switch effective atthe expiration of a predetermined period of time after the car stops torelease said door holding means and cause said closer to close saidgate, thereby to close said gate contactors to complete said car startcircuit to start the car independently of manual operation.

22. A control system for an elevator car comprising control means foreach of a plurality of landings, directional means for each of saidlandings, having up and down positions as governed by direction ofmovement of the car, said control means in conjunction with saiddirectional means effective to govern direction of car movement andcause start of the car, and said control means effective so that thoseactuated before the car in its approach to each landing reaches apredetermined distance therefrom, intercept the car on its first arrivalthereat regardless of the order in which the control means are actuated,and those actuated during approach of the car to each landing but afterit has passed said predetermined distance therefrom intercept the carupon a subsequent arrival, regardless of the order in which the controlmeans are actuated.

23. An elevator system comprising an elevator car, a plurality ofcontrols, one for each of a plu rality of landings, directional meansfor each of said landings having up and down positions as governed bydirection of movement of the car, means responsive to actuation of anyone of said control means and in conjunction with said directional meansto establish direction for car movement and cause start of the car, andthereafter responsive to all actuated control means for causing restartof the car after stop until stops have been made in response to allactuated control means, and means responsive to said actuated controlmeans to cause stop of the car at their landings in the natural order ofthe landings regardless of the order in which said control means areactuated, said stopping means being nonresponsive to any control meansactuated during said restart of the car from its landing but beingresponsive to any control means actuated at such time to stop the carthereat on a subsequent trip of the car.

24. A control system for an elevator car comprising a plurality ofcontrols, one for each of a plurality of landings, directional means foreach of said landings having up and down positions as governed bydirection of movement of the car, said control means in conjunction withsaid directional means effective to govern direction of car movement andto cause start of the car, said control means requiring actuation onlyonce to effect response of the car thereto regardless of the position ofthe car and the direction of movement of the car when actuated, andeffective to intercept the car at landings in their natural orderregardless of the order in which the control means are actuated, therestart of the car from any landings stopped at being non-interrupted byactuation of their controls at such time, the controls by actuation atsuch time being effective to cause the car to respond thereto on asubsequent trip of the car.

25. A control system for an elevator car comprising a plurality ofcontrols, one for each of a plurality of landings, a stop switch on thecar and cams in the hoistway adjacent each landing, andelectro-responsive means responsive to said controls to move said switchfrom a retractive to a non-retractive position to cooperate with saidcams, said controls being actuatable at any time,

and means'for rendering said electro-responsive means effective to movethe car carried switch to a non-retractive position to intercept the carat landings in their natural order, regardless of the order in whichsaid control means are actuated, and means to render saidelectro-responsive means ineffective to cause said stop switch tointercept the car at landings on first arrival thereat whose controlmeans are actuated after the car in its approach to landings has comewithin a predetermined distance therefrom corresponding to the point atwhich the stop switch first engages said stopping cams.

26. A control system for an elevator car comprising a plurality ofcontrols, one for each of a plurality of landings, a single stop switchand actuating cams therefor brought into and out of cooperative relationin accordance with the movement of the car, and means to move saidswitch to a non-retraotive position to condition it for actuation whenbrought into said cooperative relation with a cam by movement of thecar, said control means being operable at any time, means effective torender said switch moving means re sponsive to said control means to socondition said switch to cause its operation to intercept the car atlandings successively in their natural order regardless of the order inwhich said control means are actuated, and including means to rendersaid switch moving said means ineffective to so condition said switch tointercept the car on first arrival at landings whose control means areactuated after the car in its approach to landings has come within apredetermined distance therefrom corresponding to the point at whichsaid stop switch and a cam engage to cause stop of the car.

27. A control system for an elevator car cornprising control means foreach of a plurality of landings, a car switch to control start, stop andreversal of the car at will, and means responsive to said controls tointercept the car at landings successively in their natural order whilethe car is running under control of the car switch and without changingthe position of said car switch from its running position.

28. A control system for an elevator car comprising control means ateach of a plurality of landings, control means on the car for each ofsaid landings, a car switch to control start, stop and reversal of thecar at will, and means responsive to said controls both on the car andat said land ings to intercept the car at landings successively in theirnatural order while the car switch is in running position and withoutchanging such position thereof.

29. A control system for an elevator car comprising control means foreach of a plurality of landings, a manual control means on the carhaving up, down and neutral positions, hoisting motor mechanism for thecar, having its stop controlled by positioning said means in neutralposition, and its start controlled by the two other positions of saidmeans, said control means effective while said other means is in eitherup or down position and without disturbing same while in said positionto control said hoisting motor to efiect stop of the car at landings intheir natural order regardless of the order in which the control meansare actuated.

30. A control system for elevators comprising in combination a car,multi-speed motive means therefor, a plurality of controls, one for eachof a plurality of landings, slow-down control means for said motivemeans, a car switch having fast speed running position to control saidslow-down means, said slow-down means responsive to said first namedcontrol means to cause said motive means to slow-down successively atlandings in their natural order regardless of the order in which saidfirst named control means are actuated and without changing position ofsaid car switch from fast speed running position.

31. A control system for an elevator comprising in combination, anelevator car, multi-speed motive means therefor, a plurality of controlsone for each'of a plurality of landings, slowdown control means for saidmotive means, a car switch having fast speed running position, saidslow-down control means responsive to said car switch to cause slow-downof the car at will and at the same time responsive to said first namedcontrol means to cause said motive means to slow-down at landings intheir natural order regardless of the order in which said control meansare actuated.

32. A control system for an elevator compris ing in combination a car,multi-speed motive means therefor, a plurality of controls one for eachof a plurality of landings, slow-down control means for said motivemeans, a car switch to control direction of car movement and to startthe car and having fast speed running position, said slow-down meansresponsive to said car switch to cause slow-down of the motive means atwill and at the same time also responsive to said first named controlmeans to cause said motive means to slow-down at landings in theirnatural order regardless of the order in which said control means areactuated..-

33. A control system for an elevator comprising in combination a car,multi-speed motive means therefor, a plurality of controls one for eachof a plurality of landings, slow-down control means for said motivemeans, a car switch to control direction of car movement and to startand stop the car at will and having fast speed running position, saidslow-down means responsive to said car switch to cause slow-down of thecarat will, and responsive to said first named control means to causeautomatic slowdown and stop of the car at landings in their naturalorder, regardless of the order in which said control means are actuated.

34. A control system for an elevator car comprising in combination, acar, multi-speedmotive means therefor, a plurality of controls one foreach of a plurality of landings, start and stop control means togetherwith fast and slow speed control means responsive to said first namedcontrol means, to intercept the car at landings, a car switch to controlsaid start, stop and fast and slow-speed control means, and meanseffective so that said start, stop and fast and slowspeed means areresponsive to said first named control means to the exclusion of saidcar switch, and effective also so that said start, stop and fast andslow-speed means are responsive to said first named control means onlyto intercept the car but not to control its starts.

35. A control system for an elevator comprising in combination, anelevator car, multi-speed motive means therefor, up and down controlmeans at each of a plurality of landings, control means on the car foreach landing, slowdown control means for said motive means, saidslow-down control means responsive to said car switch to slow-down thecar at will, and responsive to said control means at the landings and onthe car to slow-down the car attheir landings in their natural orderregardless of the order in which said control means are actuated.

36. A control system for an elevator comprising in combination, a car,multi-speed motive means therefor, up and down control means at each ofa plurality of landings, control means on the car for each of saidlandings, slow-down control means for said motive means, a car switch tocontrol said motive means to govern direction of car movement to causestart and stop at will and having fast speed running position, saidslow-down means responsive to said carswitoh to slow-down the car atwill and at the same time responsive tosaid control means on the car andat said landings to slow-down the car and cause it to stopat landingssuccessively in their natural order regardless of the order in whichsaid control means are actuated, up control means causing response onlywhen the car is moving upwardly. and down control means causingresponse. only. when the car is moving downwardly. 1

3.7. A controlsystem for an elevator car comprisin control means. foreach of a plurality of landings, acar switch, and a car starting andstopping circuit including. two switches. connected in series, both ofsaid switches responsive only to said car switch to cause start of thecar, and only one of said switches being responsive to said controlmeans only to cause automatic stop of the car at. landings. 4

38. A control system for an elevator car comprising control means foreach of a plurality of landings, a car switch, hoisting motor and brakecontrol means responsive to. said first named control means to causestart and stop of the car at landings. in their natural order, saidfirst named control means requiring only a single actuation to eifectresponse thereto regardless of the position of the car when actuated,said second named control means also responsive to said car switch tocause start of the car and means to condition said first named controlmeans to cause only stop of the car and at the same time condition thecar switch to control the start of the car.

39. A control system for an elevator car com prising control means foreach of a plurality of landings, a car switch, hoisting motor and brakecontrol means responsive to said first named control means to causestart and stop of the car at landings in their natural order, said firstnamed control means requiring only a single actuation to eiiect responsethereto regardless of the position of the car when actuated, said secondnamed control means also responsive to said car switch to cause start ofthe car, and a change-over switch operable for one position to rendersaid first named control means effective to control the start and stopof the car and at the same time render said car switch ineifective, andoperable for another position to render said first named control meanselfective to. control only stop of the car and at the same time rendersaid car switch effective to control the car.

40. A control system for an elevator car comprising control means foreach of a plurality of landings, a car switch, hoisting motor and brakecontrol means responsive to said first named control means. to causestart and stop of the car at landings in their natural order, said firstnamed control means requiring only a single actuation to effect responsethereto regardless of the position of the car when actuated, said secondnamed control means also responsive to said car switch to cause start,reversal and stop of the

